CN112156949A

CN112156949A - Fixed-length limiting and tensioning device for chain manufacturing and processing

Info

Publication number: CN112156949A
Application number: CN202010869104.1A
Authority: CN
Inventors: 毕永光; 蒋俊波; 蒋俊美; 蒋阿生
Original assignee: Liyang Extra Strong Chains Manufacturing Co ltd
Current assignee: Liyang Extra Strong Chains Manufacturing Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-01-01
Anticipated expiration: 2040-08-26
Also published as: CN112156949B

Abstract

The invention belongs to the technical field of chain manufacturing, and particularly relates to a fixed-length limiting and tensioning device for chain manufacturing and processing, which comprises a bottom plate, wherein two tensioning mechanisms and a conveying mechanism are arranged on the bottom plate; a lead screw is rotatably arranged on the bottom plate, and mounting columns are arranged on the strip-shaped plates; the strip-shaped plate is rotatably provided with a bidirectional screw; two L-shaped plates are in sliding fit with the side surfaces of the mounting columns; the L-shaped plate positioned above is provided with a belt, and the L-shaped plate positioned below is provided with a slot; a limiting hole is formed in the belt, a T-shaped frame is matched on the L-shaped plate positioned below the belt, and a screw rod is horizontally and rotatably arranged on the L-shaped plate positioned below the belt; and a limiting unit is arranged at the end part of the L-shaped plate. According to the invention, the rollers at two ends of the tensioning part of the chain are tensioned in a reverse stretching way through the belt, so that the interaction force between the belt and the roller surface is very small in the tensioning process, and the roller cannot deform; the chain fixed-length conveying device can realize the directional fixed-length conveying of the chain through the conveying mechanism.

Description

Fixed-length limiting and tensioning device for chain manufacturing and processing

Technical Field

The invention belongs to the technical field of chain manufacturing, and particularly relates to a fixed-length limiting and tensioning device for chain manufacturing and processing.

Background

The transmission chain is a common transmission member and can be divided into roller chains, toothed chains and the like according to the structure, wherein the roller chains are most widely applied. The roller chain is composed of an inner chain plate, an outer chain plate, a pin shaft, a sleeve and a roller, wherein the inner chain plate is fixedly connected with the sleeve, the outer chain plate is fixedly connected with the pin shaft through interference fit, and the inner chain plate and the sleeve are called as inner chain links and outer chain links; the roller is in clearance fit with the sleeve, and the sleeve is in clearance fit with the pin shaft. The surface of the roller can generate certain abrasion in the working process of the transmission chain, and certain abrasion can be generated between the roller and the sleeve and between the sleeve and the pin shaft, so that oiling is needed between the roller and the sleeve and between the sleeve and the pin shaft after the transmission chain is manufactured. When oiling to transmission chain, need carry out local tensioning with the chain, then oil to the chain of tensioning part, current overspeed device tensioner has following problem in the use: (1) the roller surfaces at two ends of the tensioning part need to be clamped and then stretched by a fixing clamp, and the roller surfaces are easy to deform in the process; (2) need the manual work to carry the chain after accomplishing to tensioning part oiling, it is comparatively troublesome to operate.

Disclosure of Invention

Technical problem to be solved

The invention provides a fixed-length limiting and tensioning device for manufacturing and processing a chain, and aims to solve the following problems in the process of oiling the chain at present when the chain is locally tensioned: (1) the roller surfaces at two ends of the tensioning part need to be clamped and then stretched by a fixing clamp, and the roller surfaces are easy to deform in the process; (2) need the manual work to carry the chain after accomplishing to tensioning part oiling, it is comparatively troublesome to operate.

(II) technical scheme

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a spacing overspeed device tensioner of chain manufacturing processing fixed length, includes the horizontally bottom plate, and the front and back symmetry of bottom plate upper surface is provided with two straining device, and the bottom plate upper surface is located and is provided with conveying mechanism between two straining device.

The tensioning mechanism comprises a strip-shaped plate, a lead screw, a first motor, a mounting column, a bidirectional lead screw, a second motor, an L-shaped plate, a horizontal plate, a first spring, a belt, a T-shaped frame, a screw and a limiting unit. The strip-shaped plates are arranged on the upper surface of the bottom plate in a sliding way along the front-back direction. The lead screw that the bottom plate upper surface was arranged along the fore-and-aft direction through the supporting shoe rotation installation, the lead screw run through the bar shaped plate and pass through screw thread normal running fit with the bar shaped plate. The supporting block is fixedly provided with a first motor for driving the screw rod. The mounting columns are symmetrically arranged on the left and right sides of the upper surface of the strip-shaped plate and are in sliding fit with the upper surface of the strip-shaped plate along the left and right directions. The two-way lead screw that the orientation was arranged about passing through the supporting shoe rotation and installing is installed to the BAR upper surface, and two-way lead screw runs through two erection columns and passes through screw thread normal running fit with the erection column. And a second motor for driving the bidirectional screw is fixedly arranged on the supporting block. The first motor is driven to rotate through the first motor, so that the two strip-shaped plates are controlled to move oppositely or reversely. The second motor drives the bidirectional screw rod to rotate, so that the two mounting columns on the single strip-shaped plate are driven to move in opposite directions or in reverse directions.

In two symmetrical erection columns in front and back, vertical sliding fit has two L templates of arranging from top to bottom on the side of every erection column relative to another erection column, and L template is the horizontality. Two horizontal plates are fixedly mounted on the mounting column, and a first spring is fixedly connected between the horizontal plates and the L-shaped plate vertically. The lower surface of the L-shaped plate positioned above is fixedly provided with a belt, and the L-shaped plate positioned below is vertically provided with a slot matched with the belt. The belt is provided with a limiting hole, the side surface of the L-shaped plate positioned below is horizontally matched with a T-shaped frame in a sliding manner, and the end part of the T-shaped frame is matched with the limiting hole in the belt. And a screw rod penetrating through the T-shaped frame is horizontally and rotatably arranged on the side surface of the L-shaped plate positioned below. The limiting units are symmetrically arranged at the upper end part and the lower end part of the L-shaped plate. And the distance between the two mounting columns on the single strip-shaped plate is controlled by the second motor, so that the rollers at two ends of the chain to be tensioned are positioned between the upper L-shaped plate and the lower L-shaped plate. The end part of the belt is inserted into the slot of the L-shaped plate positioned below, and the T-shaped frame is driven to be inserted into the limiting hole in the belt by rotating the screw rod to fix the end part of the belt. Two bar plates are driven to move reversely through the first motor, so that the belt is attached to the surfaces of the rollers at two ends of the chain to be tensioned, reverse tensioning force is applied to the chain through the belt, and the chain is tensioned. The upper surface and the lower surface of the roller are limited through the limiting unit, and the roller is prevented from moving in the oiling process.

As a preferred technical solution of the present invention, the limiting unit includes a cross bar, a guide bar, a first electric slider, a guide cylinder, a second spring, a support bar, a second electric slider, and a sealing plug. The horizontal pole is along the horizontal fixed mounting in L template tip of fore-and-aft direction, and the vertical fixed mounting in both ends has two guide bars around the horizontal pole, and vertical sliding fit has first electronic slider between two guide bars. The surface of keeping away from the L template on the first electronic slider is along the vertical fixed mounting of fore-and-aft direction has more than two guide cylinders. The inner end face of the guide cylinder is vertically and fixedly provided with a second spring, and the end part of the second spring is fixedly provided with a support rod which is in sliding fit with the guide cylinder and penetrates through the first electric slide block and the cross rod. A second electric sliding block is vertically and slidably arranged between the two guide rods and is positioned on one side, away from the L-shaped plate, of the first electric sliding block. The guide cylinder end has been seted up the air channel, and fixed mounting has the sealing plug of mutually supporting with the air channel on the electronic slider of second. After the chain is locally tensioned, the guide cylinder, the second spring and the support rod are driven to integrally vertically move through the first electric sliding block until the end part of the support rod abuts against the surface of the roller and slides in the guide cylinder to compress the second spring. After each supporting rod is abutted against the surface of the roller, the sealing plug is driven to vertically move through the second electric sliding block until the sealing plug blocks the vent groove at the end part of the guide cylinder. After the vent slot blockked up, the guide cylinder internal gas pressure kept invariable to play the fixed action to the bracing piece, make the in-process bracing piece that oils support all the time and press and play limiting displacement at the roller surface to the roller. After oiling is finished, the sealing plug is driven to leave the vent groove through the second electric sliding block; the guide cylinder, the second spring and the support rod are driven to integrally and vertically move through the first electric slide block until the end part of the support rod is separated from the surface of the roller.

As a preferable technical solution of the present invention, in the limiting unit, a ball is installed at an end of the supporting rod to reduce friction between the supporting rod and the roller, and to prevent the supporting rod from scratching the surface of the roller during vertical movement.

As a preferred technical scheme of the invention, the conveying mechanism comprises an electric sliding plate, a square frame, a lifting platform, a supporting plate, a roller, a magnet block, a rubber clamping groove, a magnet strip, a triangular plate and an L-shaped rod. The electric skateboard is horizontally arranged on the upper surface of the bottom plate in a sliding way along the front-back direction and is positioned between the two tensioning mechanisms. The electric skateboard is vertically and fixedly provided with a square frame, and a lifting platform is vertically and slidably arranged in the square frame. The left and right symmetrical fixed mounting of elevating platform upper surface has the backup pad, evenly rotates along the fore-and-aft direction between two backup pads to install the cylinder that a plurality of arranged along the left and right sides direction. The rear end face of the lifting platform extends backwards to form a strip-shaped mounting platform, and a plurality of spherical magnet blocks are uniformly and fixedly mounted on the mounting platform along the left-right direction. The position of the top surface of the square frame corresponding to the magnet block is fixedly provided with a rubber clamping groove matched with the magnet block. The upper surface of the bottom plate is fixedly provided with a vertical plate at the rear of the conveying mechanism, and the vertical plate is fixedly provided with a magnet strip which is arranged along the left-right direction and corresponds to the rubber clamping groove in position. The upper surface of the bottom plate is vertically and fixedly provided with a triangular plate at the left side and the right side of the electric skateboard, and the top surface of the triangular plate is an inclined surface, and the front end of the top surface of the triangular plate is higher than the rear end. An L-shaped rod is fixedly arranged on the outer side of the supporting plate, and the bottom surface of the L-shaped rod is matched with the top surface of the triangular plate. After oiling is finished, the tensioning mechanism releases the tensioning limiting effect on the chain, and the chain freely falls onto the roller. The electric sliding plate drives the chain to move backwards from front to back, the magnet block is clamped in the rubber clamping groove, and the lifting platform is located at the highest point of the stroke in the vertical direction. When electric skateboard moves to the rearmost end of horizontal direction stroke, the magnet strip just in time is located directly over the magnet piece to form mutual repulsion between feasible magnet strip and the magnet piece, the magnet piece breaks away from the rubber draw-in groove under the effect of mutual repulsion, and the elevating platform no longer receives limiting displacement, and free fall supports to pressing the set-square top surface until L type pole bottom surface in square frame. The roller is separated from the chain, and the tensioning mechanism simultaneously tensions two ends of the chain. The reset process of the conveying mechanism is as follows: drive square frame, elevating platform, backup pad, cylinder, magnet piece, rubber draw-in groove and L type pole through electric skateboard and wholly move forward, and L type pole supports to press at the set-square top surface by jack-up gradually to drive elevating platform, backup pad, cylinder and the whole upward movement of magnet piece through L type pole. When the electric sliding plate returns to the initial position, the magnet block is clamped in the rubber clamping groove again, and the lifting platform returns to the highest point of the stroke in the vertical direction.

As a preferred technical scheme of the invention, a third spring is vertically and fixedly installed between the bottom surface of the lifting platform and the bottom surface of the inner surface of the square frame to buffer the lifting platform, so that the free falling of the lifting platform and the bottom surface of the inner surface of the square frame can be prevented from being impacted after the magnet block is separated from the rubber clamping groove.

As a preferable technical scheme of the invention, the end face of the L-shaped rod is rotatably provided with a roller matched with the top surface of the triangular plate so as to reduce the friction force between the end face of the L-shaped rod and the top surface of the triangular plate and prolong the service life of the L-shaped rod and the triangular plate.

(III) advantageous effects

The invention has at least the following beneficial effects:

(1) the invention solves the following problems existing in the prior oiling process of the chain when the chain is locally tensioned: the roller surfaces at two ends of the tensioning part need to be clamped and then stretched by a fixing clamp, and the roller surfaces are easy to deform in the process; need the manual work to carry the chain after accomplishing to tensioning part oiling, it is comparatively troublesome to operate.

(2) According to the fixed-length limiting tensioning device for chain manufacturing and processing, rollers at two ends of a tensioning part of a chain are reversely stretched and tensioned through the belt, the interaction force between the belt and the surfaces of the rollers is small in the tensioning process, and the rollers cannot deform; and the belt can cooperate with the roller surface of different diameter sizes, can carry out the tensioning to the chain of different roller sizes.

(3) According to the fixed-length limiting and tensioning device for chain manufacturing and processing, the conveying mechanism is used for conveying the chain in a fixed length from front to back, after the conveying mechanism is used for locally tensioning the chain, the conveying mechanism can be automatically separated from the chain in the resetting process, the interference between the conveying mechanism and the chain is avoided during resetting, the horizontal mutual extrusion between the conveying mechanism and the chain roller is further avoided, and the damage to the surface of the roller is avoided.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a top view of a portion of a drive chain in an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a fixed-length limiting and tensioning device for manufacturing and processing a chain in an embodiment of the invention;

FIG. 3 is a side view of a fixed length limit tensioner during chain manufacturing in an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of a position A of the fixed length limiting and tensioning device for manufacturing and processing the chain in the embodiment of the invention;

FIG. 5 is an enlarged schematic view of a chain manufacturing process at a fixed length limit tensioner B in an embodiment of the present invention;

FIG. 6 is a schematic view of the internal structure of the joint of the belt, the T-shaped frame and the L-shaped plate in the embodiment of the invention;

FIG. 7 is a schematic diagram of the internal structure of a limiting unit of a fixed-length limiting tensioning device for manufacturing and processing a chain in the embodiment of the invention;

fig. 8 is a schematic view of the internal structure of the conveying mechanism part of the fixed-length limiting and tensioning device for chain manufacturing processing in the embodiment of the invention.

In the figure: 1-bottom plate, 2-tensioning mechanism, 21-strip plate, 22-lead screw, 23-first motor, 24-mounting column, 25-bidirectional lead screw, 26-second motor, 27-L-shaped plate, 28-horizontal plate, 29-first spring, 210-belt, 211-T-shaped frame, 212-screw rod, 213-limit unit, 2131-cross rod, 2132-guide rod, 2133-first electric slide block, 2134-guide cylinder, 2135-second spring, 2136-support rod, 2137-second electric slide block, 2138-sealing plug, 2139-ball, 3-conveying mechanism, 31-electric slide plate, 32-square frame, 33-lifting table, 34-support plate, 35-roller, 36-magnet block, 37-rubber clamping groove, 38-magnet bar, 39-triangle, 310-L-shaped rod, 311-third spring, 312-roller.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 2 to 8, the present embodiment provides a fixed length limiting and tensioning device for manufacturing and processing a chain, which is used for performing local tensioning and limiting on the chain as shown in fig. 1, the fixed length limiting and tensioning device for manufacturing and processing a chain includes a horizontal bottom plate 1, two tensioning mechanisms 2 are symmetrically arranged in front and back of the upper surface of the bottom plate 1, and a conveying mechanism 3 is arranged on the upper surface of the bottom plate 1 between the two tensioning mechanisms 2.

The tensioning mechanism 2 comprises a strip-shaped plate 21, a lead screw 22, a first motor 23, a mounting column 24, a bidirectional lead screw 25, a second motor 26, an L-shaped plate 27, a horizontal plate 28, a first spring 29, a belt 210, a T-shaped frame 211, a screw 212 and a limiting unit 213. The strip-shaped plate 21 is slidably mounted on the upper surface of the base plate 1 in the front-rear direction. The upper surface of the bottom plate 1 is rotatably provided with a lead screw 22 arranged along the front-back direction through a supporting block, and the lead screw 22 penetrates through the strip-shaped plate 21 and is in threaded rotation fit with the strip-shaped plate 21. A first motor 23 for driving the screw 22 is fixedly mounted on the support block. The mounting columns 24 are symmetrically arranged on the left and right of the upper surface of the strip-shaped plate 21, and the mounting columns 24 are in sliding fit with the upper surface of the strip-shaped plate 21 along the left and right directions. The upper surface of the strip-shaped plate 21 is rotatably provided with a bidirectional screw 25 arranged along the left-right direction through a supporting block, and the bidirectional screw 25 penetrates through the two mounting columns 24 and is in threaded rotation fit with the mounting columns 24. A second motor 26 for driving the bidirectional screw 25 is fixedly mounted on the support block. The first motor 23 drives the first motor 23 to rotate, so as to control the two strip-shaped plates 21 to move in opposite directions. The two-way screw 25 is driven by the second motor 26 to rotate, so as to drive the two mounting posts 24 on the single strip-shaped plate 21 to move towards or away from each other.

In two symmetrical installing posts 24 in front and back, two L-shaped plates 27 arranged up and down are vertically matched on the side surface of each installing post 24 opposite to the other installing post 24 in a sliding way, and the L-shaped plates 27 are in a horizontal state. Two horizontal plates 28 are fixedly mounted on the mounting column 24, and a first spring 29 is vertically and fixedly connected between the horizontal plates 28 and the L-shaped plate 27. The lower surface of the L-shaped plate 27 positioned above is fixedly provided with a belt 210, and the L-shaped plate 27 positioned below is vertically provided with a slot matched with the belt 210. The belt 210 is provided with a limiting hole, the side surface of the L-shaped plate 27 positioned below is horizontally matched with a T-shaped frame 211 in a sliding manner, and the end part of the T-shaped frame 211 is matched with the limiting hole on the belt 210. A screw 212 penetrating through the T-shaped frame 211 is horizontally and rotatably arranged on the side surface of the lower L-shaped plate 27. The limiting units 213 are symmetrically arranged at the ends of the upper L-shaped plate 27 and the lower L-shaped plate 27.

In this embodiment, the limiting unit 213 includes a cross bar 2131, a guide rod 2132, a first electric slider 2133, a guide tube 2134, a second spring 2135, a support rod 2136, a second electric slider 2137, a sealing plug 2138 and a ball 2139. The transverse rod 2131 is horizontally and fixedly installed at the end part of the L-shaped plate 27 along the front-back direction, two guide rods 2132 are vertically and fixedly installed at the front end and the back end of the transverse rod 2131, and a first electric sliding block 2133 is vertically matched between the two guide rods 2132 in a sliding manner. More than two guide cylinders 2134 are vertically and fixedly arranged on the surface, far away from the L-shaped plate 27, of the first electric slide block 2133 along the front-back direction. A second spring 2135 is vertically and fixedly mounted on the inner end surface of the guide tube 2134, and a support rod 2136 which is in sliding fit with the guide tube 2134 and penetrates through the first electric slide block 2133 and the cross bar 2131 is fixedly mounted on the end part of the second spring 2135. A second electric sliding block 2137 is vertically and slidably mounted between the two guide rods 2132 on one side of the first electric sliding block 2133 away from the L-shaped plate 27. A vent groove is formed in the end of the guide tube 2134, and a sealing plug 2138 which is matched with the vent groove is fixedly mounted on the second electric sliding block 2137. The end of the support rod 2136 is provided with a ball 2139 to reduce the friction between the support rod 2136 and the roller and avoid scratching the surface of the roller during the vertical movement of the support rod 2136.

In the present embodiment, the conveying mechanism 3 includes an electric slide plate 31, a square frame 32, a lifting table 33, a support plate 34, a roller 35, a magnet block 36, a rubber slot 37, a magnet bar 38, a triangle 39, and an L-shaped rod 310. The electric skateboard 31 is horizontally slidably mounted on the upper surface of the base plate 1 between the two tensioning mechanisms 2 in the front-rear direction. The electric skateboard 31 is vertically and fixedly provided with a square frame 32, and a lifting platform 33 is vertically and slidably arranged in the square frame 32. The left and right symmetrical fixed mounting of elevating platform 33 upper surface has backup pad 34, evenly rotates along the fore-and-aft direction between two backup pads 34 to install the cylinder 35 that a plurality of arranged along the left and right direction. The rear end face of the lifting platform 33 extends backwards to form a strip-shaped mounting platform, and a plurality of spherical magnet blocks 36 are uniformly and fixedly mounted on the mounting platform along the left-right direction. A rubber clamping groove 37 matched with the magnet block 36 is fixedly arranged on the top surface of the square frame 32 corresponding to the position of the magnet block 36. The upper surface of the bottom plate 1 is fixedly provided with a vertical plate behind the conveying mechanism 3, and the vertical plate is fixedly provided with a magnet strip 38 which is arranged along the left-right direction and corresponds to the rubber clamping groove 37. The upper surface of the bottom plate 1 is vertically and fixedly provided with the triangular plates 39 at the left and right sides of the electric skateboard 31, and the top surfaces of the triangular plates 39 are inclined planes, and the front ends of the top surfaces of the triangular plates 39 are higher than the rear ends. An L-shaped rod 310 is fixedly arranged on the outer side of the supporting plate 34, and the bottom surface of the L-shaped rod 310 is matched with the top surface of the triangular plate 39.

In this embodiment, the tensioning process of the chain by the tensioning mechanism 2 is as follows: the distance between the two mounting studs 24 on the single strip 21 is controlled by a second motor 26 so that the rollers at the two ends of the chain to be tensioned are located between the upper L-shaped plate 27 and the lower L-shaped plate 27. The end of the belt 210 is inserted into the slot of the L-shaped plate 27 located below, and the T-shaped bracket 211 is driven by rotating the screw 212 to be inserted into the limit hole on the belt 210 to fix the end of the belt 210. The two strip plates 21 are driven by the first motor 23 to move reversely so that the belt 210 is attached to the roller surfaces of both ends of the chain to be tensioned, and reverse tensioning force is applied to the chain by the belt 210, thereby tensioning the chain. The upper surface and the lower surface of the roller are limited through the limiting unit 213, and the roller is prevented from moving in the oiling process. The limiting unit 213 limits the roller surface as follows: after the chain is partially tensioned, the first electric sliding block 2133 drives the guide cylinder 2134, the second spring 2135 and the support rod 2136 to integrally and vertically move until the end part of the support rod 2136 is pressed against the surface of the roller and slides in the guide cylinder 2134 to compress the second spring 2135, the distance of sliding of each support rod 2136 in the guide cylinder 2134 is different because the surface of the roller is in the shape of an arc, and in the process, part of air in the guide cylinder 2134 is discharged from the vent groove by the support rod 2136. After each support rod 2136 is pressed against the surface of the roller, the second electric slide block 2137 drives the sealing plug 2138 to vertically move until the sealing plug 2138 blocks the vent groove at the end of the guide cylinder 2134. After the vent groove is blocked, the air pressure in the guide cylinder 2134 keeps constant, so that the support rods 2136 are fixed, and the support rods 2136 are always pressed on the surface of the roller to limit the roller in the oiling process. After oiling is finished, the second electric sliding block 2137 drives the sealing plug 2138 to leave the vent groove; the guide cylinder 2134, the second spring 2135 and the support rod 2136 are driven by the first electric slide block 2133 to integrally and vertically move until the end part of the support rod 2136 is separated from the surface of the roller.

The working process of the conveying mechanism 3 is as follows: after oiling is finished, the tensioning mechanism 2 releases the tensioning limiting effect on the chain, and the chain freely falls onto the roller 35. The electric sliding plate 31 drives the chain to move forwards and backwards, the magnet block 36 is clamped in the rubber clamping groove 37, and the lifting platform 33 is located at the highest point of the vertical direction stroke. When the electric sliding plate 31 moves to the rearmost end of the horizontal stroke, the magnet bar 38 is just above the magnet block 36, so that a mutual repulsion force is formed between the magnet bar 38 and the magnet block 36, the magnet block 36 is separated from the rubber clamping groove 37 under the action of the mutual repulsion force, the lifting table 33 is not limited any more, and freely falls in the square frame 32 until the bottom surface of the L-shaped rod 310 abuts against the top surface of the triangular plate 39. The drum 35 is separated from the chain and the tensioning mechanism 2 simultaneously tensions both ends of the chain. The reset process of the conveying mechanism 3 is as follows: the square frame 32, the lifting platform 33, the supporting plate 34, the roller 35, the magnet block 36, the rubber clamping groove 37 and the L-shaped rod 310 are driven by the electric sliding plate 31 to integrally move forwards, the L-shaped rod 310 is pressed against the top surface of the triangular plate 39 and is gradually jacked up, and therefore the lifting platform 33, the supporting plate 34, the roller 35 and the magnet block 36 are driven by the L-shaped rod 310 to integrally move upwards. When the electric slide plate 31 returns to the initial position, the magnet block 36 is re-clamped in the rubber clamping groove 37, and the lifting table 33 returns to the highest point of the vertical stroke. A third spring 311 is vertically and fixedly installed between the bottom surface of the lifting table 33 and the bottom surface of the inner surface of the square frame 32, so as to buffer the lifting table 33 and prevent the free falling of the lifting table 33 from colliding with the bottom surface of the inner surface of the square frame 32 after the magnet block 36 is separated from the rubber clamping groove 37. The end face of the L-shaped rod 310 is rotatably provided with a roller 312 matched with the top surface of the triangular plate 39, so that the friction between the end face of the L-shaped rod 310 and the top surface of the triangular plate 39 is reduced, and the service life of the L-shaped rod 310 and the triangular plate 39 is prolonged.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a spacing overspeed device tensioner of chain manufacturing processing fixed length which characterized in that: the fixed-length limiting and tensioning device for chain manufacturing and processing comprises a horizontal bottom plate (1), two tensioning mechanisms (2) are symmetrically arranged in front of and behind the upper surface of the bottom plate (1), and a conveying mechanism (3) is arranged on the upper surface of the bottom plate (1) between the two tensioning mechanisms (2);

the tensioning mechanism (2) comprises a strip-shaped plate (21), a lead screw (22), a first motor (23), a mounting column (24), a bidirectional lead screw (25), a second motor (26), an L-shaped plate (27), a horizontal plate (28), a first spring (29), a belt (210), a T-shaped frame (211), a screw (212) and a limiting unit (213); the strip-shaped plates (21) are arranged on the upper surface of the bottom plate (1) in a sliding manner along the front-back direction; the upper surface of the bottom plate (1) is rotatably provided with a lead screw (22) which is arranged along the front-back direction through a supporting block, and the lead screw (22) penetrates through the strip-shaped plate (21) and is in rotating fit with the strip-shaped plate (21) through threads; a first motor (23) for driving the screw rod (22) is fixedly arranged on the supporting block; the mounting columns (24) are symmetrically arranged on the left and right sides of the upper surface of the strip-shaped plate (21), and the mounting columns (24) are in sliding fit with the upper surface of the strip-shaped plate (21) along the left and right directions; the upper surface of the strip-shaped plate (21) is rotatably provided with a bidirectional screw rod (25) arranged along the left-right direction through a supporting block, and the bidirectional screw rod (25) penetrates through the two mounting columns (24) and is in rotating fit with the mounting columns (24) through threads; a second motor (26) for driving the bidirectional screw rod (25) is fixedly arranged on the supporting block;

in two symmetrical mounting columns (24) in front and back, two L-shaped plates (27) which are vertically arranged are vertically matched on the side surface of each mounting column (24) opposite to the other mounting column (24) in a sliding way, and the L-shaped plates (27) are in a horizontal state; two horizontal plates (28) are fixedly installed on the installation column (24), and a first spring (29) is vertically and fixedly connected between the horizontal plates (28) and the L-shaped plate (27); a belt (210) is fixedly arranged on the lower surface of the upper L-shaped plate (27), and a slot matched with the belt (210) is vertically formed in the lower L-shaped plate (27); a limiting hole is formed in the belt (210), a T-shaped frame (211) is horizontally matched with the side surface of the L-shaped plate (27) located below in a sliding mode, and the end portion of the T-shaped frame (211) is matched with the limiting hole in the belt (210) in a mutual mode; a screw rod (212) penetrating through the T-shaped frame (211) is horizontally and rotatably arranged on the side surface of the L-shaped plate (27) positioned below; limiting units (213) are symmetrically arranged at the upper end part of the L-shaped plate (27) and the lower end part of the L-shaped plate (27).

2. A fixed-length limit tensioning device for chain manufacturing and processing according to claim 1, wherein: the limiting unit (213) comprises a cross bar (2131), a guide rod (2132), a first electric sliding block (2133), a guide cylinder (2134), a second spring (2135), a support rod (2136), a second electric sliding block (2137) and a sealing plug (2138); the transverse rod (2131) is horizontally and fixedly arranged at the end part of the L-shaped plate (27) along the front-back direction, two guide rods (2132) are vertically and fixedly arranged at the front end and the back end of the transverse rod (2131), and a first electric sliding block (2133) is vertically matched between the two guide rods (2132) in a sliding manner; more than two guide cylinders (2134) are vertically and fixedly arranged on the surface, far away from the L-shaped plate (27), of the first electric slide block (2133) along the front-back direction; a second spring (2135) is vertically and fixedly installed on the inner end surface of the guide cylinder (2134), and a support rod (2136) which is in sliding fit with the guide cylinder (2134) and penetrates through the first electric slide block (2133) and the cross rod (2131) is fixedly installed on the end part of the second spring (2135); a second electric sliding block (2137) is vertically and slidably arranged between the two guide rods (2132) and is positioned on one side of the first electric sliding block (2133) far away from the L-shaped plate (27); the end part of the guide cylinder (2134) is provided with a vent groove, and a sealing plug (2138) which is matched with the vent groove is fixedly arranged on the second electric sliding block (2137).

3. A fixed-length limit tensioning device for chain manufacturing and processing according to claim 1, wherein: in the limiting unit (213), a ball (2139) is arranged at the end part of a support rod (2136).

4. A fixed-length limit tensioning device for chain manufacturing and processing according to claim 1, wherein: the conveying mechanism (3) comprises an electric sliding plate (31), a square frame (32), a lifting table (33), a supporting plate (34), a roller (35), a magnet block (36), a rubber clamping groove (37), a magnet strip (38), a triangular plate (39) and an L-shaped rod (310); the electric sliding plate (31) is horizontally and slidably arranged on the upper surface of the bottom plate (1) in the front-back direction and is positioned between the two tensioning mechanisms (2); a square frame (32) is vertically and fixedly arranged on the electric sliding plate (31), and a lifting platform (33) is vertically and slidably arranged in the square frame (32); supporting plates (34) are symmetrically and fixedly arranged on the left and right of the upper surface of the lifting platform (33), and a plurality of rollers (35) which are arranged along the left and right direction are uniformly and rotatably arranged between the two supporting plates (34) along the front and back direction; the rear end surface of the lifting platform (33) extends backwards to form a strip-shaped mounting platform, and a plurality of spherical magnet blocks (36) are uniformly and fixedly mounted on the mounting platform along the left-right direction; a rubber clamping groove (37) matched with the magnet block (36) is fixedly arranged on the top surface of the square frame (32) corresponding to the position of the magnet block (36); a vertical plate is fixedly arranged on the upper surface of the bottom plate (1) behind the conveying mechanism (3), and magnet strips (38) which are arranged along the left-right direction and correspond to the rubber clamping grooves (37) in position are fixedly arranged on the vertical plate; the upper surface of the bottom plate (1) is vertically and fixedly provided with a triangular plate (39) at the left side and the right side of the electric sliding plate (31), the top surface of the triangular plate (39) is an inclined surface, and the front end of the top surface of the triangular plate (39) is higher than the rear end; an L-shaped rod (310) is fixedly arranged on the outer side of the supporting plate (34), and the bottom surface of the L-shaped rod (310) is matched with the top surface of the triangular plate (39).

5. A chain manufacturing processing fixed length limit tensioning device according to claim 4, characterized in that: and a third spring (311) is vertically and fixedly arranged between the bottom surface of the lifting platform (33) and the bottom surface of the inner surface of the square frame (32).

6. A chain manufacturing processing fixed length limit tensioning device according to claim 4, characterized in that: and the end surface of the L-shaped rod (310) is rotatably provided with a roller (312) matched with the top surface of the triangular plate (39).